Porting 101

[millpro]

Alright I got the 257 ported out. I had to port the top of the exhaust window a tad more than I was comfortable with because when the ring and piston scored it nicked the top of the exhaust port so o had to at least clean that up. The whole time I'm thinking if I screw it up I'll just pop a 262 p/c on it and be done. I also opened up the intake and hogged out the intake spacer. Squish was at .030. I was wanting .020 but I will live with it. Got home this evening and got it all buttoned up and it started right up.

 

[millpro]

Trying to download a video but it keeps telling me it's to large even though I've shortened it to 20 sec. Oh well anyways the 257 ported is hitting a real good lick and has great throttle response. Brad I honed it just a tad to get some good cross hatch and my compression is around 140# I have .030 squish . What should I expect to see once this thing breaks in a bit. 150 to 160???